Imaginary Picture of K2-25 b

Display orbital revolution of K2-25 b around the hoststar EPIC 210490365
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Exoplanet Name : K2-25 b
Alternate Name : EPIC 210490365 b
Radius (Rjup / Re): 0.3069 (Rjup) 3.4400 (Rearth)
Mass (Mjup / Me): 0.0771 (Mjup) 24.5130 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0299 (AU Est.)
Eccentricity : 0.4280
Orbital Period(Yrs) 0.0095
Orbital Period(Observed/Estimated) 3.48 (Days Obs.) 0.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 12198.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 469.1 (K)
Blackbody T 0.3(K) 440.5 (K)
Blackbody T 0.7(K) 356.4 (K)
Tidally Locked Blackbody T 0.1(K) 557.8 (K)
Tidally Locked Blackbody T 0.3(K) 523.8 (K)
Size Class: Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : EPIC 210490365
Alternate Name : 2MASS J04130560+1514520
Star Distance(LY) : 149.1
Stellar Radius(Rsun) : 0.3 (Rsun Measured)
Stellar Mass(Msun) : 0.3 (Msun Measured) 0.3 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3180 (K)
Spectral type : M4.5
Metalicity : 0.1
Absolute Magnitude: 12.6
Apparent Magnitude: 15.9
Right Ascension(RA) 63.2750
Declination (DEC) 15.2478
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Andrew W. Mann, Eric Gaidos, Gregory N. Mace, Marshall C. Johnson, Brendan P. Bowler, Daryll LaCourse, Thomas L. Jacobs, Andrew Vanderburg, Adam L. Kraus, Kyle F. Kaplan, Daniel T. Jaffe"
Discovery Paper - Title Zodiacal Exoplanets In Time (ZEIT) I: A Neptune-sized planet orbiting an M4.5 dwarf in the Hyades Star Cluster
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/EPIC%20210490365%20b/
K2-25 b
K2-25 b

  • K2-25 b is an exoplanet orbiting the star EPIC 210490365, located about 149.1 light-years (45.7 pc) away from Solar System. Its discovery was publicly announced on 2015.
  • The host star EPIC 210490365 has apparent magnitude of 15.9, with absolute magnitude of 12.6.
  • It is 0.3 times more massive and 0.3 times bigger compared with our Sun. The surface temperature is 3180 with its spectral types of M4.5
  • In this planetary system, the extrasolar planet K2-25 b orbits around the star EPIC 210490365 every 3.5 days with its orbital distance of 0.03 AU ( 4474522.3 km)
  • (Projected orbit of K2-25 b around its host star EPIC 210490365)


  • The Star EPIC 210490365 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.065 AU ( 9667949.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.089 AU ( 13363632.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.136 AU ( 20363218.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.200 AU ( 29965368.4 km)
  • Radiation at Planetary Boundary of K2-25 b : 12198.73 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star EPIC 210490365)



  • Kopparapu Recent Venus for Star EPIC 210490365 distance : 0.073 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star EPIC 210490365 distance : 0.093 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star EPIC 210490365 distance : 0.090 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star EPIC 210490365 distance : 0.099 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 210490365 distance : 0.183 AU
  • Kopparapu Outer Boundary for Early Mars for Star EPIC 210490365 distance : 0.193 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star EPIC 210490365)



  • Original Kopparapu Recent Venus for Star EPIC 210490365 distance : 0.073 AU
  • Original Kopparapu Runaway Greenhouse for Star EPIC 210490365 distance : 0.096 AU
  • Original Kopparapu Moist Greenhouse for Star EPIC 210490365 distance : 0.096 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 210490365 distance : 0.186 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star EPIC 210490365 distance : 0.194 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star EPIC 210490365)



    (Position in Stellar Map of star EPIC 210490365 and its Exoplanet K2-25 b)



    (Zoomed position in Stellar Map of star EPIC 210490365 and its Exoplanet K2-25 b (zoom level 3))